<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="index.js"></script>
</head>
<body>

</body>
<script>
    //数组的浅拷贝slice和concat
    //数组的深拷贝JSON.parse和JSON.stringify;
</script>
</html>